What is a line chart? A line chart is a type of visualization that connects discrete values connected by lines to show changes and trends. Line charts are useful for tracking quantitative data over some sequence, often (though not always) time, known as a time series. You’ll typically plot the measure or metric along the y-axis, with your sequence along the x-axis, like the count of orders (y-axis) over time (x-axis). Line charts, like bar charts, are a go-to chart for visualizing changes in data and for forecasting future data based on trends. Example line chart in Metabase Figure 1 shows a line chart that plots the number of reviews from the Sample Database’s Reviews table over time, broken out by month: Fig. 1. A line chart showing the number of reviews over time. This example also includes a trend line showing the overall direction of the points on the chart. You have a lot of options when it comes to customizing a line chart, whether you want to display your data as an area chart, adjust the scale of axes in your line chart, or even track multiple series within one graph. Key article Guide to line charts Related terms Time series Bar chart Area chart Combo chart Further reading Line, bar, and area chart documentation Which chart should you use? Time series comparisons Did this article help you? Yes No Send Thanks for your feedback!